а) -27x + 220 = -5x
-27x + 5x = -220
-22x = -220
x = -220 : (-22)
x = 10
б) 7a = -310 + 3a
7a – 3a = -310
4a = -310
a = -310 : 4
a = -77,5
в) -2x + 16 = 5x - 19
-2x – 5x = -19 – 16
-7x = -35
x = -35 : (-7)
x = 5
г) 25 – 3b = 9 – 5b
-3b + 5b = 9 – 25
2b = -16
b = -16 : 2
b = -8
д) 3 + 11y = 203 + y
11y – y = 203 – 3
10y = 200
y = 200 : 10
y = 20
е) 3 (4x - 8) = 3x – 6
12x – 24 = 3x – 6
12x + 3x = -6 + 24
15x = 18
x = \(\frac{18}{15}\)
x = \(\frac{6}{5}\)
x = \(1\frac{1}{5}\)
x = 1,2
ж) -4 (-z + 7) = z + 17
4z – 28 = z + 17
4z – z = 17 + 28
3z = 45
z = 45 : 3
z = 15
з) c – 32 = (c + 8) \(\cdot\) (-7)
c – 32 = -7c – 56
c + 7c = -56 + 32
8c = -24
c = -24 : 8
c = -3
и) 12 – 2 (k + 3) = 26
12 – 2k – 6 = 26
-2k = 26 – 12 + 6
-2k = 30
k = 30 : (-2)
k = -15
к) -5 (3a + 1) – 11 = -16
-15a – 5 - 11 = -16
-15a = -16 + 5 + 11
-15a = 0
a = 0 : 15
a = 0
л) -3,2n + 4,8 = -2 (1,2n + 2,4)
-3,2n + 4,8 = -2,4n – 4,8
-3,2n + 2,4n = -4,8 – 4,8
-0,8n = 9,6
n = 9,6 : (-0,8)
n = -12
м) -5 (0,8z – 1,2) = -z + 7,2
-4z + 6 = -z + 7,2
-4z + z = 7,2 – 6
-3z = 1,2
z = 1,2 : (-3)
z = -0,4.

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